A researcher wishes to​ estimate, with 90​% ​confidence, the population proportion of adults who support labeling legislation for genetically modified organisms​ (GMOs). Her estimate must be accurate within 3​% of the true proportion.   ​(a) No preliminary estimate is available. Find the minimum sample size needed. ​(b) Find the minimum sample size​ needed, using a prior study that found that 85​% of the respondents said they support labeling legislation for GMOs. ​(c) Compare the results from parts​ (a) and​ (b). ​(a) What is the minimum sample size needed as

MATLAB: An Introduction with Applications
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A researcher wishes to​ estimate, with
90​%
​confidence, the population proportion of adults who support labeling legislation for genetically modified organisms​ (GMOs). Her estimate must be accurate within
3​%
of the true proportion.
 
​(a) No preliminary estimate is available. Find the minimum sample size needed.
​(b) Find the minimum sample size​ needed, using a prior study that found that
85​%
of the respondents said they support labeling legislation for
GMOs.
​(c) Compare the results from parts​ (a) and​ (b).
​(a) What is the minimum sample size needed assuming that no prior information is​ available?
 
n=nothing
​(Round up to the nearest whole number as​ needed.)
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